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Advanced Analog Technology - BUCK BOOST AND BOOST PWM CONTROLLER

Numéro de référence AAT1105A
Description BUCK BOOST AND BOOST PWM CONTROLLER
Fabricant Advanced Analog Technology 
Logo Advanced Analog Technology 





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AAT1105A fiche technique
Advanced Analog Technology, Inc.
AAT1105A
Details are subject to change without notice.
BUCK_BOOST & BOOST PWM CONTROLLER
Features
www.DataShzeet4UC.coomm plete PWM Power Control Circuitry
CH1: Buck_Boost, CH2: Boost
z Under-Voltage Lockout (UVLO) Protection
z Totem Pole Output
z Output Short Circuit Protection
z Dead-Time Control 0% to 100%
z Wide Operating Frequency
10kHz to 800kHz
z Shutdown Control
z Power Good Protection
z VDD Range: 2.6V~6.5V
Pin Configuration
TOP VIEW
Ct
Rt
SHDN
IE1
OE1
1
2
3
4
5
16 VREF
15 SCP
14 PGO
13 IE2
12 OE2
DTC1 6
11 DTC2
OUT1
GND
7
8
10 OUT2
9 VDD
(TSSOP-16 PACKAGE)
General Description
The AAT1105A provides an integrated two-channel
pulse-width-modulation (PWM) solution for the
power supply of DC-DC system. This device
offers system engineers the flexibility to tailor-make
the power supply circuitry for specific applications.
Each channel contains its own error amplifier,
PWM comparator, dead–time control (DTC), and
output driver. The under-voltage protection,
oscillator, short circuit protection (SCP) and voltage
reference circuit are the common features for the
two channels.
The AAT1105A contains one step-up (boost) circuit
at channel two (CH2) and one inverting
(buck_boost) circuit at channel one (CH1).
Dead-time control can be set to provide 0% to
100% dead-time through a resistive divider network.
Soft-start can be implemented by paralleling the
DTC resistor with a capacitor. Two dead-time
control inputs are assigned for CH1 and CH2
individually, and dead-time control inputs can be
used to control on / off operation.
The compact design and optimized external parts of
AAT1105A offers a simple and effective solution.
––
Advanced Analog Technology, Inc.
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